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Oscillator (RI Pin)
F
OSC
F
PFM
DC
MAX_W
DC
MAX_F
ΔF
TEMP
T
BLANK
F
PFM
V
OL
V
OH
T
R1
T
F1
T
R2
T
F2
T
R3
T
F3
T
R4
T
F4
VG
CLAMP
F
Jiggling
∆f_osc
Normal Frequency
PFM Frequency
Maximum Duty Cycle PWM
Maximum Duty Cycle PFM
Frequency Temp. Stability
Leading-Edge Blanking Time
Frequency PFM
Output Low Level
Output High Level
Rising Time
Falling Time
Rising Time
Falling Time
Rising Time
Falling Time
Rising Time
Falling Time
Output Clamp Voltage
RI=100Kohm
RI=100Kohm
RI=100Kohm
RI=100Kohm
-30~100℃
RI=100Kohm
V
DD
=16V, I
O
=20mA
V
DD
=16V, I
O
=20mA
C
L
=500pF
C
L
=500pF
C
L
=1000pF
C
L
=1000pF
C
L
=1500pF
C
L
=1500pF
C
L
=2000pF
C
L
=2000pF
VDD=20V
60
65
22
78
78
5
300
70
KHz
KHZ
%
%
%
nS
%
V
V
ns
ns
ns
ns
ns
ns
ns
ns
V
KHz
%
-4
4
0.8
GATE Drive Output (GATE Pin)
10
123
71
248
116
343
153
508
209
18.0
65
-3
3
Frequency Jiggling
Low EMI frequency
RI=100Kohm
RI=100Kohm
Frequency modulation range / Base frequency
Notice:
The drive current of GATE pin is a variable value, which is decided by
I
=
K( V
VDD
−
V
GATE
−
2.8)
2
(Among these, K
is a invariable coefficient，V
GATE
is the voltage of GATE pin, V
VDD
is the voltage of VDD pin)；So the higher the VDD voltage is
and the lower the output voltage is, the bigger the drive transient current is. When the GATE voltage is 0V and the VDD voltage
is 13V, the output drive current would over 120mA. The output driver current would decrease with increasing of the GATE
voltage.
DS-RS2051-09 No v, 2010
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